Telephone service concentrator



Dec. 9, Y1958 s. F. DUNNlNG Ewu.Y 2,863,950

TELEPHONE SERVICE coNcENTRAToR Filed may 27. 1954 k 29 sheets-sheet 1 m..wm

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TELEPHONE SERVICE coNcENTRAToR 29 Sheets-Sheet 2 Filed May 27, 1954 GDSN .wm

ATTORNEY 9, 1958 s. F. DNNING ETAL TELEPHONE SERVICE coNcENTRAToR FiledMay 27. 1954 29 Sheefs-Sheet 3 5. E DUNN/Nc ATTORNEY Dec. 9, 1958 A 's.F. DUNNING ETAL 2,853,950

TELEPHONE SERVICE coNcENTRAToR 29 Sheets-Sheet 4 Filed May 27. 1954 s.F. DUNNING Er Al. 2,863,950 TELEPHONE SERVICE coNcENTRAToR Dec. 9, 195829 Sheets-sheet 5 Filed May 27. 1954 M l m s WB A TTORNEY 9, 1958 s. F.DUNNING ETAL 2,863,950

TELEPHONE SERVICE CONCENTRATOR 29 Sheets-Sheet 6 Filed May 27. 1954 ook5.5 DUNN/NG mmvmwm Dec. 9, 1958 s. F. DUNNING ETAL 2,863,950

TELEPHONE SERVICE CONCENTRATOR Filed May 27, 1954 29 Sheets-Sheet 7llllllll nlllllllllla Num 5./-1 DUNN/NG /NVEZT/ORS o. H. MACPHERso/v A TTORNE V Dec. 9, 1958 S. F. DUNNING ETAL TELEPHONE SERVICE coNoENTRAToR29 Sheets-Sheet 8 Filed May 2'?. 1954 S. F. DUNN/NGv /NVENToRs a H. MACPHERSON erg/ I 3.7 t, I

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TELEPHONE SERVICE CONCENTRATOR 29 Sheets-Sheet 10 ,sf DUNN/NG/NVEg/TORS- 0. H. MA cPHERso/v 7M/21W W.

ATTORNE V Filed May 27, 1954 c l5 5. F. DUNNING ETAL 29839950 TELEPHONESERVICE CONCENTRTOR ATTORNEY 29 Sheets-Sheet 1l 5. F.' DUNN/NG V WW2/ORSa H.. MAC PHERSON L G m N N U D E .a

TELEPHONE SERVICE CONCENTRATOR 29 Sheets-Shea?l 12 Filed May 27. 1954v5. E DUNN/NG mgl/TOPS ll H. MAC PHERSO/V Q um ATTORNEY s. F. DUNNINGErm. 2,863,950 TELEPHONE SERVICE coNoENTRAToR D@u 9, wss

29 'sheetSLsheet 13 Filed May 27, 1954 s.F. DUNN/NG /NVENTORS o. H. MACPHERsoN ATTORNEY E .wt

29 Sheets-Sheet 14 s. E DUNN/NG NVE/XO D. H. MAcPHERso/v MAW AT TOR/VE VS F DUNNING ETAL TELEPHONE SERVICE CONCENTRATOR Dec. 9, ma@

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u @Si Dec, l@ Lfs. F. DuNNlNG ErAL 253,950

TELEPHONE SERVICE CONCENTRATOR n 29 Sheets-Sheet 15 Filed May 27, 1954s. F.' DUNN/NG /NVENTOR QH. MAC PHERSON ATTORNEY Deco 9,' i958 s. F.DUNNING ETAL.

TELEPHONE SERVICE CONCENTRATOR 29 Sheets-Sheet 16 Filed may 27. 1954 diQQ s. E DUNN/NG /NVENTORS o. H. MACPHERSON A T TORNEV s. F. DUNNING x-rAL 2,863,950

TELEPHONE SERVICE coNcENTRAToR Dec. 9, 1958 29 yshefrsLsheet 17 FiledMay 27, 1954 QMUQ YIM NQ s s. F. DUNN/NG /fvI/Eg/VTORS o. H.MAcPHE/QsO/V ATTORNEV- s. F. UNNING Er-AL TELEPHONE SERVICE coNcENTRAToR29 Sheets-Sheet 18 Filed May 27. 1954 QQQ xm l s SQ QEPSS 55.

Dec. 9, 1958 s. F. DUNNING ET Al. 2,863,950

TELEPHONE SERVICE coNcENTRAToR 29 Sheets-Sheet 19 Filed May 27, 1954@JUS sf DUNN/NG /NVE/g/)ons D H MAC/DHERSON @Mw :f/0MM' QNNK A T TOR/VEY Dec. 9, 1958 s. F. DUNNING ETAL 2,863,950

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